科研之友
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摘要
In this article, a single-layer dual-polarization transmission metasurface (MS) is proposed for multi-feed and multi-focus characteristics. The unit of the MS is formed by two metal layer patches, which are in each side of a substrate, respectively, and are connected by four metal via. The units can realize 360 degrees phase shift, and 13 x 13 units are arranged to design a near field focusing transmitarray with required focusing point numbers, positions and feed numbers. As example, two MSs with size 8.32 lambda(0) x 8.32 lambda(0) at 16 GHz are designed and one is fabricated and measured. The measured result validated the design. Compared with the existing transmitting MSs, the developed MSs have the following advantages: single-layer substrate, dual polarization, multi-focus, and multi-feeds.
